----I’m going to the United States.---- How long ____you ____in the States ?
He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.
I want to show you is my gratitude and respect for your continuous and selfless help.
______ we have confidence and determination, we can win the match.
In those years, poverty ______, hungry farmers wandered about the countryside.
The picture shows my mother is sitting by my bed, ______ me stories till I fell asleep.